A climatic reconstruction in historical times based on the freezing date records and sediment cores at Lake Suwa

基于诹访湖结冰日期记录和沉积岩芯的历史时期气候重建

• 批准号: 07408001
• 负责人: MIKAMI Takehiko
• 金额: $ 10.75万
• 依托单位: TOKYO METROPOLITAN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07408001/
• 关键词: Lake Suwa; climatic variation; lake sediments; Omiwatari; お神渡り; 有機炭素; 小氷期

In the summer of 1996, we extracted 2m long (around 800 years) sediment core samples from Lake Suwa using a piston corer. Sampled lake sediments were sliced in every 2.5 cm to analyze the color quality, the magnetized ratio, the specific gravity, the mineral composition, and the content of carbon, nitrogen and sulfur. The results show that organic carbon content is an effective indicator of climatic variations. Thus we examine the relationship between the organic carbon content of Lake sediment cores and the freezing dates of Lake Suwa for the last 500 years.An attempt was made to estimate winter temperatures based on the long term record of the freezing dates of Lake Suwa using the linear regression equation (r=0.80). Estimated winter temperature time-series indicated that early 1600's was a coldest period, whereas both 1480's and 1540's were relatively warm. Temperature showed increasing trend from 1750's to 1860's, during which severe famine occurred frequently in Japan.

在1996年夏天，我们提取了2米长（约800年）的沉积物岩心样品从Suwa湖使用活塞取样器。对湖泊沉积物样品每隔2.5cm进行切片，分析颜色质量、磁化率、比重、矿物组成以及碳、氮和硫的含量。结果表明，有机碳含量是反映气候变化的有效指标。因此，我们研究了近500年来湖泊沉积物柱样的有机碳含量与Suwa湖的冻结日期之间的关系，并试图根据Suwa湖冻结日期的长期记录，使用线性回归方程（r=0.80）来估计冬季温度。估计的冬季温度时间序列表明，17世纪初是最冷的时期，而1480年代和1540年代都相对温暖。18世纪50 - 60年代，日本气温呈上升趋势，饥荒频繁发生。

项目成果

Mikami, T.: "Long-term variations of summer temperatures in Tokyo since 1721" Geographical Reports of Tokyo Metropolitan Univ.31. 157-165 (1996)

Mikami, T.：“自 1721 年以来东京夏季气温的长期变化”东京都立大学地理报告31。

Takehiko MIKAMI: "Long term variations of summer temperetures in Tokyo since 1721" Geographical Reports of Tokyo Metropol. Univ.31. 157-165 (1996)

Takehiko MIKAMI：“自 1721 年以来东京夏季气温的长期变化”东京都地理报告。

Mikami, T.and Ishiguro, N.: "Climatic variations for the last 550 years reconstructed from the freezing date records of Lake Suwa" Kisho-Kenkyu Note (Meteorological Research Note). 191. 73-83 (1998)

Mikami, T. 和 Ishiguro, N.：“根据诹访湖结冰日期记录重建的过去 550 年的气候变化”Kisho-Kenkyu Note（气象研究笔记）。

池田まゆみ・福沢仁之 ほか2名: "湖沼年縞堆積物によるグローバルな気候・海水準変動の検出" 気象研究ノート. (印刷中). (1998)

Mayumi Ikeda、Hitoshi Fukuzawa 和其他 2 人：“利用湖泊沉积物检测全球气候和海平面变化”气象研究笔记（1998 年）。

福沢仁之: "最終氷期以降の気候・海水準の年々変動を読む" 科学. 68. 353-360 (1998)

Hitoshi Fukuzawa：“解读自上一个冰河时代以来气候和海平面的年度变化”《科学》68. 353-360 (1998)。